Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Axial and Radial Distributions of Bubble Holdup in a Slurry Bubble Column with Pilot Plant Scale

파일럿규모 슬러리 기포탑에서 기포체류량의 축방향, 반경방향 분포

  • Lim, Dae-Ho (School of Chemical Engineering, Chungnam National University) ;
  • Jang, Ji-Hwa (School of Chemical Engineering, Chungnam National University) ;
  • Kang, Yong (School of Chemical Engineering, Chungnam National University) ;
  • Jun, Ki-Won (Green Chemical Technology Division, Korea Research Institute of Chemical Technology)
  • 임대호 (충남대학교 화학공학과) ;
  • 장지화 (충남대학교 화학공학과) ;
  • 강용 (충남대학교 화학공학과) ;
  • 전기원 (한국화학연구원 그린화학연구단)
  • Published : 2011.04.30
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Abstract

Axial and radial distributions of bubble holdup were investigated in a slurry bubble column with pilot plant scale(D=1.0 m). Effects of gas velocity, surface tension of continuous liquid medium and solid fraction in the slurry phase on the axial and radial distributions of bubble holdup were examined. The bubble holdup decreased with increasing radial dimensionless distance from the center of the column, while it increased with increasing dimensionless distance in the axial direction from the distributor, in all the cases studied. The radial non-uniformity of bubble holdup increased with increasing gas velocity but decreasing surface tension of liquid medium, while it was not dependent upon the solid fraction in the slurry phase. The axial non-uniformity of bubble holdup increased with increasing gas velocity, but it does not change considerably with variations of liquid surface tension or solid fraction in the slurry phase . The axial and radial distributions of bubble holdup were well correlated in terms of operating variables within this experimental conditions.

직경 1.0 m인 파일럿 규모 슬러리 기포탑에서 기포체류량의 축방향, 반경방향분포를 고찰하였다. 기체의 유속, 연속 액상의 표면장력 그리고 슬러리상에 포함된 고체입자의 분율이 기포탑 내부 기포의 축방향 및 반경방향 분포에 미치는 영향을 검토하였다. 본 연구의 실험조건 모두에서 체류량은 기포탑의 중심으로부터 반경방향 무차원 거리가 증가함에 따라 감소하였으며, 기포탑의 분산판으로부터 축방향의 무차원의 거리가 증가함에 따라 증가하였다. 기포체류량의 반경방향 불균일도는 기체의 유속이 증가함에 따라 연속 액상의 표면장력이 감소함에 따라 증가하였으나 슬러리상에 포함된 고체입자 분율에는 크게 영향을 받지 않았다. 본 연구의 범위에서 축방향과 반경방향 기포체류량의 분포는 각각의 실험변수의 상관식으로 나타낼 수 있었다.

Keywords

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